Javascript Number divisors()

Number.prototype.divisors = function () {
    "use strict";
    var ans = [],
        max = this;/*from w ww  .  j  a  v  a2 s.c  o  m*/
    for (i = 1; i < max; i += 1) {
        if (max.isDivisor(i)) {
            ans.push(i);
        }
    }
    if (ans.length > 30) {
        console.log("amount " + ans.length);
    }
    return ans;
};

Number.prototype.divisors = function() {
    var ans = [];
    if (this.isInteger()) {
        for (let i = 1; i < Math.abs(this / 2+1 ); i++) {
            if ((this).isDivisor(i)) {
                ans.push(i);/*from   w ww  .  j  a  v  a 2s  . com*/
            }
        }
        ans.push(this);
    }
    return ans;

}

Number.prototype.divisors = function(){
  var ans = [];/*from   www.  ja  v a 2s  .c o  m*/
  var max = this;
  for(i=1;i<=max/2;i++){
    if(max.isDivisor(i)){
      ans.push(i);
    }
  }
  ans.push(max.valueOf());
  return ans;
}

Number.prototype.divisors = function(){
    var ans = [];
    var max = this;
    for(i = 1; i<=max/2; i++){
        if(this.isDivisor(i)){
            ans.push(i);//from  w w  w . j a  v a  2  s. com
        }
    }
    ans.push(this.valueOf());
    return ans;
}

Number.prototype.divisors = function(){
  var ans = [];//  w w w  .j  a v  a 2  s.  c  o  m
  var max= this;
  for(var i=1; i<=this; i++){
    if(this.isDivisor(i)){
      ans.push(i);
    }
  }

  return ans;
}

Number.prototype.divisors = function () {
  var ans = [];/*www  .  j  av a2s .  co  m*/
  var max = this;
  for (i=1; i < max/2; i++) {
    if(max.isDivisor(i)){
      ans.push(i);
    }
  }
  ans.push(max.valueOf());
  return ans;

};